Properties of severe plastically deformed Mg alloys

Enhanced stretch formability and mechanical properties of a magnesium alloy processed by cold forging and subsequent annealing

“…For this reason, there have been extensive efforts to obtain grain-refined Mg alloys by applying severe plastic deformation (SPD) techniques, among them the equal channel angular pressing (ECAP) [2][3][4], accumulative roll bonding (ARB) [5] and multi-directional forging (MDF) [6,7] are the representative ones. In ECAP, the accumulation of redundant shear strain and dynamic recrystallization (DRX) refine the microstructure while increasing the material's yield strength but reducing the ductility [4]. Most of these investigations are at elevated temperature because of the easy occurrence of DRX, which can bring about grain refinement of the deformed alloy [8].…”

Bulk Mg–3Al–Zn alloy with ultrafine grain size produced by powder metallurgy

“…It has been demonstrated that powder metallurgy process can further refine grain size of Mg alloy, compared to severe plastic deformation (SPD) [2,[7][8][9]. Lu et al [10][11][12][13][14][15] have successfully proved that PM was an effective technique to synthesize high strength UFG Mg alloys. But for pure Mg or solute solution hardened Mg alloys (such as AZ31) with a low content of alloying elements, it is difficult to achieve an UFG microstructure due to the rapid growth kinetics of the single-phase grains.…”

Microstructural evolution during partial remelting of equal channel angular pressed ZW21 magnesium alloy

“…During ECAP, a billet is pressed through a die that consists of two channels with equal cross-section, intersecting at an angle [26,27]. Since the cross-section shape of billet remains nearly the same, the pressing deformation can be repeated for many passes and a very large strain can be introduced without cracking.…”

“…Since the cross-section shape of billet remains nearly the same, the pressing deformation can be repeated for many passes and a very large strain can be introduced without cracking. However, investigations on commercial and engineering applications of ECAP are rarely reported and most of the existing studies have been focused on microstructures and mechanical properties of aluminum or magnesium alloys [26][27][28][29][30]. Jiang et al used this technology to fabricate semisolid ingots of magnesium alloy for thixoforming.…”